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MAN B&W 1.06
The main advantages of the Alpha cylinder lubricating
oil system, compared with the conventional
mechanical lubricator, are:
• Improved injection timing
• Increased dosage flexibility
• Constant injection pressure
• Improved oil d<strong>is</strong>tribution in the cylinder liner
• Possibility for prelubrication before starting.
More details about the cylinder lubrication system
can be found in Chapter 9.
For long-term gas operation, BN40-50 cylinder oil <strong>is</strong>
necessary. For long-term operation on HFO with a
high sulphur content, a BN70 cylinder oil <strong>is</strong> necessary.
If long-term operation on both fuels <strong>is</strong> foreseen,
two storage/service tanks for cylinder lube oil <strong>is</strong>
required onboard.
Gallery Arrangement
The engine <strong>is</strong> provided with gallery brackets, stanchions,
railings and platforms (exclusive of ladders).
The brackets are placed at such a height as to provide
the best possible overhauling and inspection
conditions.
Some main pipes of the engine are suspended
from the gallery brackets, and the topmost gallery
platform on the manoeuvring side <strong>is</strong> provided with
overhauling holes for the p<strong>is</strong>tons.
The engine <strong>is</strong> prepared for top bracings on the exhaust
side, or on the manoeuvring side.
Piping Arrangements
The engine <strong>is</strong> delivered with piping arrangements
for:
• Fuel oil
• Gas pipes
• Sealing oil pipes
• Heating of fuel oil pipes
• Lubricating oil, p<strong>is</strong>ton cooling oil and
hydraulic oil pipes
• Cylinder lubricating oil
• Cooling water to scavenge air cooler
• Jacket and turbocharger cooling water
• Cleaning of turbocharger
• Fire extingu<strong>is</strong>hing in scavenge air space
• Starting air
• Control air
• Oil m<strong>is</strong>t detector
• Various drain pipes.
Page 7 of 8
All piping arrangements are made of steel piping,
except the control air and steam heating of fuel
pipes, which are made of copper.
The pipes are provided with sockets for local instruments,
alarm and safety equipment and, furthermore,
with a number of sockets for supplementary signal
equipment. Chapter 8 deals with the instrumentation.
Gas pipes
A common rail (constant pressure) system <strong>is</strong> to be
fitted for high�pressure gas d<strong>is</strong>tribution to each
valve block.
Gas pipes are designed with double walls, with the
outer shielding pipe designed so as to prevent gas
outflow to the machinery spaces in the event of
rupture of the inner gas pipe. The intervening space,
including also the space around valves, flanges,
etc., <strong>is</strong> equipped with separate mechanical ventilation
with a capacity of approx. 0 � 0 air changes
per hour.
The pressure in the intervening space <strong>is</strong> to be below
that of the engine room and, as mentioned earlier,
(extractor) fan motors are to be placed outside the
ventilation ducts, and the fan material must be manufactured
from spark�free material. The ventilation
inlet air must be taken from a gas safe area.
Gas pipes are arranged in such a way, see Fig.
7.00.0 , that air <strong>is</strong> sucked into the double�wall piping
system from around the pipe inlet, from there into the
branch pipes to the individual cylinder blocks, via the
branch supply pipes to the main supply pipe, and via
the suction blower to the atmosphere. Ventilation air
<strong>is</strong> to be exhausted to a safe place.
MAN B&W ME-GI engines 198 50 59-7.1
MAN Diesel